More than two dozen firefly species in the U.S. and Canada haven’t been seen for at least a decade.
Source: Lost Firefly Species Rediscovered in Delaware After 43 Years
til fireflies have unique flashing patterns depending on the species. and you have to look at their junk to determine actual species:
Heckscher: This species has a unique flash pattern. Once I saw the flash pattern, I was confident I had relocated the species. However, to be absolutely sure, the male genitalia needed to be examined to rule out all closely related species.
